body {
    background: #FAFAFB;
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    min-height: 100vh;
    font-size: 1.12rem;
}
.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    justify-content: center;
}kham to
.header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 32px;
}
.logo-bg {
    background: #11111A;
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}
.main-title {
    font-size: 2.18rem;
    font-weight: 700;
    color: #11111A;
    margin: 0;
}
.subtitle {
    color: #6B7280;
    font-size: 1.18rem;
    margin-top: 4px;
    margin-bottom: 0;
}
.login-card {
    background: #fff;
    padding: 32px 28px 24px 28px;
    border-radius: 16px;
    box-shadow: 0 2px 16px rgba(17,17,26,0.08);
    width: 400px;
    max-width: 90vw;
    text-align: left;
    margin-bottom: 18px;
    border: 1px solid #F1F1F3;
    font-size: 1.08rem;
}
.welcome {
    font-size: 1.32rem;
    font-weight: 600;
    color: #11111A;
    margin: 0 0 4px 0;
}
.card-subtitle {
    color: #6B7280;
    font-size: 1.08rem;
    margin-bottom: 24px;
    margin-top: 0;
}
form label {
    display: block;
    margin-bottom: 6px;
    font-size: 1.08rem;
    color: #11111A;
    font-weight: 500;
}
.input-group {
    display: flex;
    align-items: center;
    background: #F6F6F7;
    border-radius: 8px;
    margin-bottom: 18px;
    padding: 0 12px;
    border: 1px solid #E5E7EB;
}
.input-group .icon {
    color: #6B7280;
    margin-right: 8px;
    display: flex;
    align-items: center;
}
.input-group input {
    border: none;
    background: transparent;
    flex: 1;
    padding: 12px 0;
    font-size: 1.08rem;
    outline: none;
    color: #11111A;
}
.input-group input::placeholder {
    color: #6B7280;
    opacity: 1;
}
.toggle-password {
    cursor: pointer;
    margin-left: 8px;
    display: flex;
    align-items: center;
}
.options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    font-size: 1.08rem;
}
.options label {
    font-weight: 400;
    color: #11111A;
    display: flex;
    align-items: center;
    gap: 6px;
}
.options input[type="checkbox"] {
    accent-color: #11111A;
    width: 16px;
    height: 16px;
}
.options .forgot {
    color: #11111A;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.08rem;
}
.btn {
    width: 100%;
    background: #11111A;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 13px 0;
    font-size: 1.13rem;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 0;
    transition: background 0.2s;
    box-shadow: none;
}
.btn:hover {
    background: #23232D;
}
.footer {
    font-size: 1.08rem;
    color: #6B7280;
    text-align: center;
    margin-top: 0;
}
.footer span {
    color: #11111A;
    font-weight: 500;
    text-decoration: none;
}